JPH0571235A - Protecting method for snow layer-cooling piping - Google Patents

Abstract

PURPOSE:To prevent a snow layer-cooling piping from being damaged due to chipping of a snow layer by the snow surface sliding device and snow surface preparing device of ski plates and the like, in an artificial snow ski ground with the snow layer cooling piping set on a floor surface forming the snow layer. CONSTITUTION:The laminated layer 19 of sand or sand-like substance is formed on a floor surface in a state that a snow layer cooling piping 5 is embedded in the laminated layer. Then, the laminated layer 19 is impregnated with water, and the impregnated water is frozen by cooling, and on the laminated layer 19 with the frozen impregnated water, a snow layer 4 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for protecting a snow layer cooling pipe arranged on a floor surface forming a snow layer.

[0002]

2. Description of the Related Art Conventionally, a snow layer cooling pipe is arranged on a floor surface forming a snow layer, and the snow layer formed on the floor surface is maintained by cooling by the snow layer cooling pipe. In a snow ski area, a snow layer is formed directly on the floor with the snow layer cooling pipe buried in the snow layer, and an ice layer is provided in the ice layer with a snow layer cooling pipe. It was formed on the floor surface in a buried state, and a snow layer was formed on this ice layer.

[0003]

However, the snow layer is scraped off by a skiing equipment such as a ski or a snow surface maintenance device, and even if the ice layer is provided, the ice layer is scraped after the snow layer. In the end, there was a risk that the snow layer cooling pipe was exposed and damaged.

When the snow layer cooling pipe is damaged, the cooling medium in the pipe leaks out, which requires a great deal of labor and expense for restoration, and the snow layer of skis cannot be used during restoration work. It invites a situation such as.

In particular, when a white resin pipe is used for the snow layer cooling pipe, it is difficult to visually distinguish the snow layer or the ice layer from the snow layer cooling pipe, and the pipe strength against cutting is higher than that of the steel pipe. Since it is low, the above risks are particularly high.

An object of the present invention is to effectively protect the snow layer cooling pipe by a rational method.

[0007]

The first characteristic constitution of the method for protecting the snow layer cooling pipe according to the present invention is that the snow layer cooling pipe is arranged on the floor surface forming the snow layer. A layer of sand or sand-like material is formed on the floor surface with the snow layer cooling pipe embedded in the layer, and the layer is impregnated with water and the impregnated water is frozen by cooling. The formation of the snow layer on the layer of the laminated layer in which the impregnated water is frozen has the following actions and effects.

[0008]

That is, in the above-mentioned first characteristic structure, when the sand or sand-like material is impregnated with water and the impregnated water is frozen, the impregnated water frozen in the voids between the sand particles or sand-like particles is It becomes a solidified material, and because it is a solid layer in which sand or sand-like substances that are densely packed are aggregates, it becomes denser than snow layers, or simply by freezing water. It has much higher strength than the ice layer without aggregates.

Therefore, by placing the snow layer cooling pipe in the buried state in the layer of the sand or sand-like substance in which the impregnated water is frozen, and forming the snow layer on the layer of this layer, the snow layer is formed. Even if it is scraped off by a skiing equipment such as a ski or a snow surface maintenance device, the pipe for cooling the snow layer can be effectively protected with the high strength of the laminated layer.

[0010]

As a result, according to the first characteristic configuration of the present invention, a snow layer cooling pipe is damaged due to skiving of a snow layer by a skiing equipment such as skis or a snow surface maintenance device.
Compared with the conventional method, it can be avoided more surely that a lot of labor and cost are required for the restoration, and that the snow layer such as skis cannot be used during the restoration work. Therefore, the floor surface forming the snow layer can be avoided. This has made it possible to greatly improve the manageability and reliability of a snow layer facility in which a snow layer cooling pipe is installed in the area.

[Second and Third Characteristic Configurations of the Present Invention] The second characteristic configuration of the snow layer cooling pipe protecting method according to the present invention is as follows:
A marker of a color other than white is laid in a buried state at the boundary between the stack and the snow layer.

A third characteristic configuration of the method for protecting a snow layer cooling pipe according to the present invention is that at least the layer surface of the laminate is colored other than white.

That is, according to the second characteristic structure or the third characteristic structure, the fact that the scraping of the snow layer has reached the boundary between the stack and the snow layer means that the second characteristic structure is not white. It is possible to easily and surely discriminate by the exposure of the color markers and the exposure of the laminated surface of colors other than white in the third characteristic configuration, and appropriate measures can be taken before the damage of the protective layer itself due to scraping. The cooling pipe can be more reliably prevented from being damaged.

[0014]

EXAMPLES Next, examples will be described.

FIG. 1 shows an indoor artificial snow ski area, 1 is a building, 2 is a floor provided with an inclined portion for forming a slope, and a snow layer 4 formed on the floor surface is formed on the floor surface. The snow layer cooling pipes 5 for cooling the are arranged in parallel.

Reference numeral 6 is an air conditioner for cooling the indoor air A,
A refrigerating machine 7 circulates and supplies a low temperature refrigerant to each of the snow layer cooling pipe 5 and the air cooling coil 6a in the air conditioner 6.

Reference numeral 8 denotes a ventilation facility, which discards a part of the indoor air A sucked from the suction passage 9 to the outside through the exhaust passage 10,
Further, a mixed air of the rest of the indoor air A sucked from the suction passage 9 and the amount of outside air taken in from the outside air introduction passage 11 is supplied indoors through the blower passage 13 provided with the dehumidifying device 12. It is configured to do so.

Reference numeral 14 denotes a total heat exchanger for collecting the cold heat of the exhaust gas to be discarded outdoors and precooling the outside air taken in by the recovered cold heat.

Further, 15 is compressed by a compressor 16,
In addition, it is a spray nozzle for producing artificial snow that sprays the air cooled by the cooler 17 and the water cooled by the cooler 18 indoors.

To create the snow layer 4 on the floor,
First, prior to the creation of the snow layer 4 itself, sand is sprinkled on the floor surface to form a sand stack 19 on the floor surface, and the snow layer cooling pipe 5 is embedded in the sand stack 19 (for example, Sand stack 1
The surface of 9 is further 3 mm from the upper end of the pipe 5 for cooling the snow layer
It is a state in which it is located at a high position by about 10 mm).

Then, a low-temperature refrigerant is circulated and supplied to the snow layer cooling pipe 5 to make the snow layer cooling pipe 5 have a cooling function, and in this state, water is sprayed on the sand layer 19 to disperse the spray water.
Is impregnated with water, and the impregnated water is frozen by cooling with the snow layer cooling pipe 5.

On the surface of the sand stack 19 in which the impregnated water is frozen, a wire mesh marker 20 colored other than white is laid.

When the impregnation of the impregnated water in the sand stack 19 is completed (or in parallel with the step of freezing the impregnated water in the sand stack 19), the low temperature refrigerant is circulated and supplied to the air cooling coil 6a of the air conditioner 6. Run 6 which cools the interior below freezing.

Thereafter, cold water is sprayed from the artificial snow generating nozzle 15 together with compressed cooling air into a sub-freezing room, and the spray water is frozen into fine ice particles by the adiabatic expansion change accompanying this spraying and the cooling in the sub-freezing atmosphere. Using this as artificial snow, a marker 20 made of wire mesh is embedded on the layer of the sand stack 19 in which the impregnated water is frozen to a predetermined thickness (for example, 140 mm).
The snow layer 4 is formed by stacking the layers.

That is, the snow layer 4 is used for skiing or the like after the above-mentioned snow layer is formed. In the use of the snow layer, the snow layer 4 is formed by a ski, another snow surface runner, or a snow surface maintenance device. Was scraped off, and this scraped off was sand laminated 1
The fact that the artificial snow has been replenished by advancing to the surface of No. 9 can be easily determined by the exposure of the marker 20 of a color other than white.

Further, by arranging the snow layer cooling pipe 5 in the sand layer 19 in which the impregnated water is frozen, the snow layer cooling pipe 5 is embedded so that the snow layer can be cooled by scraping off with a snow surface sliding tool such as a ski or a snow surface maintenance device. It is designed to prevent the pipe 5 for use from being exposed and being damaged by the indication of the progress of scraping by the marker 20 and the pipe protecting function by the high strength of the impregnated water frozen sand laminate 19.

When the snow layer is used after the snow layer has been formed, the low-temperature refrigerant is continuously supplied to the snow layer cooling pipe 5 to prevent the snow layer 4 from melting due to the cooling function of the snow layer cooling pipe 5. On the other hand, the indoor air cooling by the air conditioner 6 is lowered or stopped to release the indoor maintenance of the sub-zero temperature,
Prevent skiers and other snow users from feeling the extreme cold.

Further, in the operation of the ventilation equipment 8, the dehumidifying output of the dehumidifying device 12 is adjusted to adjust the indoor air humidity so that the dew point temperature of the indoor air A becomes substantially equal to the surface temperature of the snow layer 4, and thereby the skier. In addition to preventing the water replenished in the indoor air A from condensing on the surface of the snow layer due to the breathing of the snow layer user or the intake of the outside air, on the contrary, the water diffuses from the snow layer 4 into the indoor air A Also, the snow layer 4 is stably maintained in a good condition suitable for gliding.

The artificial snow is replenished for scraping off the snow layer 4 and the like by the operation of the air conditioner 6 during the snow layer use stop time, such as at night, when the interior of the indoor snow is again brought to the sub-freezing atmosphere and the artificial snow generating nozzle 15 is used. Artificial snow is generated by, or artificial snow manufactured separately is transported.

[Other Embodiments] Next, other embodiments will be listed.

The pipe protection layer 19 formed on the floor surface with the snow layer cooling pipe 5 buried therein and impregnated with water to freeze the impregnated water is not limited to the layer of sand. However, as the laminated material, various sand-like materials such as granular plastic materials and granular ceramic materials other than sand, that is,
Various granular solid materials other than frozen substances can be applied.

The snow layer 4 can be formed by spraying cold water with compressed air into a sub-freezing atmosphere as in the above-described embodiment, or by adding an ice layer or a sand layer on the above-mentioned sand or sand-like substance in which impregnated water is frozen. A method of forming a frozen layer of a water-containing polymer material and cutting and crushing the ice layer or the frozen layer of the water-containing polymer material to form an artificial snow layer, or humidifying water or fine water mist given in the air to the sand or Various methods can be adopted, such as a method in which frost is formed on a layer of sand-like material and the frost layer is used as an artificial snow layer.

Various materials such as steel pipes and resin pipes can be applied to the snow layer cooling pipe 5, and the cooling medium to be circulated in the pipe is cold water or brine, or the snow layer cooling pipe 5
A variety of refrigerants such as CFCs that can be vaporized in the state of using as an evaporator can be used.

When a marker 20 of a color other than white is laid in the state of being embedded in the boundary between the laminated layer 19 of sand or sand-like material and the snow layer 4, the marker 20 is not limited to a mesh body such as a wire mesh. Also, various materials such as a sheet-shaped body and a tape-shaped body can be applied.

By making at least the surface of the sand or sand-like laminate 19 a color other than white, it is possible to easily visually confirm that the snow layer 4 has been scraped off to the surface of the sand or sand-like laminate 19. You may be able to.

It is also possible to omit the installation of the marker 20 and the coloring of the laminate 19 of the article or the sandy substance other than white.

The present invention can be applied when the snow layer 4 is formed for purposes other than skiing.

It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a block diagram of an indoor artificial snow ski resort showing an embodiment of the present invention

[Explanation of symbols]

 4 Snow layer 5 Snow layer cooling pipe 19 Sand or sand-like material stack 20 Marker

Claims (3)

[Claims] 1. A method for protecting a snow layer cooling pipe (5) arranged on a floor forming a snow layer (4), comprising a layer of sand or sand-like material (19) in the layer. The snow layer cooling pipe (5) is formed on the floor surface in a buried state, the laminate (19) is impregnated with water, the impregnated water is frozen by cooling, and the impregnated water is frozen. (1
A method for protecting a snow layer cooling pipe, wherein the snow layer (4) is formed on the layer 9). 2. A pipe for cooling a snow layer according to claim 1, wherein a marker (20) of a color other than white is laid in a buried state at a boundary between the stack (19) and the snow layer (4). How to protect. 3. The method for protecting a snow layer cooling pipe according to claim 1, wherein at least the layer surface of the laminate (19) is colored in a color other than white.